# Copyright 2022 ByteDance Ltd. and/or its affiliates.
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.

class PluginLoader(object):
    registrations = dict()

    @staticmethod
    def lookup(op_name):
        """Get op's plugin so loader function

        Parameters
        ----------
        op_name : str
            op class name

        Returns
        -------
        loader : callable
            op plugin's so loader function

        """
        if op_name in PluginLoader.registrations:
            return PluginLoader.registrations[op_name]
        return None

    @staticmethod
    def register(op_name, func):
        """

        Parameters
        ----------
        op_name : str
            op class name

        func : callable
            op plugin's so loader function

        Returns
        -------

        """
        PluginLoader.registrations[op_name] = func
